The invention relates to the technical field of power systems, in particular to a multi-source data fusion-oriented power distribution network intelligent planning system, which comprises a data acquisition module, a region division module, a current situation analysis module, a load prediction module, a power balance module, a unit system planning module, a scheme comparison and selection moduleand a planning project library module; the advanced information communication technology is fully utilized, a power distribution network intelligent planning system which integrates drawing and data,interacts on line, is intelligent and efficient is built; intelligent area statistics, intelligent diagnosis analysis, intelligent scheme checking and intelligent scheme recommendation are achieved; visualized, on-line and intelligent operation of a power distribution network unit system planning full-service process is promoted to be achieved, and the efficiency and the quality of planning work are improved; through a planning algorithm, information such as power grid resources, geographic topography, gallery resources, environmental specialty, local planning and urban layout is widely fused,comprehensively considered and comprehensively calculated by taking a power distribution network power supply unit as an aperture, so that the scientificity and the reasonability of power distribution network planning are improved.